Boots of swiftness Upgrade Template

With the Boots of Swiftness appearing in both A Minecraft Movie and Minecraft Dungeons, I think they should be added to the base game. I propose introducing them using an underused feature: smithing! Here’s how it will work: a swiftness upgrade template can rarely be found in desert temples(based on MCD loot). When combined with any boot and a feather in a smithing table, it creates boots of swiftness, which don’t retain enchantments applied to the boots prior, providing balance to the game. I propose the boots work in one of three ways; a) they work how they work in MCD b) they increase movement speed without any activation c) they increase movement speed based on how much health the player as (I.e. the player at half a heart moves fastest) or d) the movement speed increases as XP goes up.